Edinburgh, Royal Botanic Garden, 1983, 1984, 1987, 1991 and 1994.
Octavo, five volumes, with numerous line illustrations plus a colour frontispiece in the fourth item, and 12 colour plates in the fifth one.
Card covers; top edges and one leading edge slightly marked; an excellent group.
The Royal Government of Bhutan commissioned the work, which is now complete in three volumes, each comprising three parts. [5 items].